POA-100648 Tasks "Collect databases diskspace usage for service" and/or "Lock database user" could occupy whole TaskManager.
Included from OA 6.0.6 HOTFIX 127450 DatabaseManager v1
APS-29967 Incorrect DB query leads to an attempt to remove DBs that belong to other applications.
APS-30605 Incorrect error in CCP when attempt to change user's password for db connected with site application.
This hotfix can be downloaded from here.
Use pa_updates_installer KB111323 to install this hotfix. Also this hotfix will be installed automatically during upgrade to OA 6.0.6 via pa_updates_installer.